Hollow-piston pump



(No Model.) Y

J. P. HESS, F. H. SNYDER, L. HESSQJ. P; SNYDER 8: 0. 1?. SNYDER.

HOLLOW PISTON PUMP.

Patented Mar. 25, 1884.

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UNITED STATES PATENT, OFFicE.

JACOB F. HESS, FREDRIOICH. SNYDER, LIE-NERD HESS, JACOB F. SNYDER, AND CHARLES F. SNYDER, OF MASSILLON, OHIO.

HOLLOW-PISTON PUMP.

SPECIFICATION forming part of Letters Patent No. 295,639, dated March 25, 1884.

Application filed March 13, 1883.

such as will enable others skilled in the artto which it appertains to make and use the same.

Our invention relates to an improvement in hollow-piston pumps, the object of the same being to provide a device that shall combine simplicityand economy in construction with durability and efiiciency in use 5 and with these ends in view our invention consists in the parts and combinations of parts, as will be more fully described, and pointed out in the claims. p e

In the accompanying drawings, Figure 1 is a vertical sectional view of our improved pump. Fig. 2 is a detached view of the piston; Fig. 3, a plan view of the chamber detached. l A represents a pump cylinder or barrel, of any desired size, resting on and secured to the chamber B, through which the water passes before entering the barrel. The lower end of this chamber B is screw-threaded for the attachment of a pipe, which latter extends downward below the surface of the water. The water, as it is drawn upward by the plunger, first enters the chamber B, and, if the piston O is on its upstroke, passes into the barrel A through the valve-opening D, and if on the downstroke, passes up the side passage, E,and enters the barrel A above the piston, the upper end of the passage E being closed by a valve, F, which prevents the water from pass ing back through the passage E duringthe upstroke of the piston. The upper face of the chamber B is provided around the valve v;

with acircular recess, or with pockets 6, into which the sand and dirt drawn up through thesuction'tubesettles,thereby preventing it from getting on the elevated valve-seat and preventing the closure of thevalve.

To the upper end of the pump-barrel Athe (No model.)

pipe G is secured. This pipe, which can be of any desired length,connects with the pumpstock, which latter is provided with the usual spout for the exit of water. This pipe G is provided with an opening, a, which is adapted to be closed by the slide H, the inner face of which is covered with leather for the purpose of forming a water-tight j oint. This slide is made tapering, and is held in position by the band I), and is operated by the rod I, the

upper end of which terminates in a ring or.

suitable handle. By simply pushing the rod I downward the water in the stock will flow therefrom back into the well for the purpose of preventing it from freezing in the stock.

J is a hollow piston-rod, to the upper endof which is rigidly secured the plunger-rod K, the lower end ofwhich forms a plug for the upper end of the hollow piston-rod. This pistonrod is provided near its upper end with perforations 0, through which the water issues into the pipe G, and is provided near its lower end with similar perforations, d, through which the water enters the rod.

To the lower end of the rod J the piston L is rigidly secured. This piston is composed of the outer ring, e, having upper and lower annular flanges, the perforated top and bottom plates, f, respectively, provided with upwardly and downwardly extending annular flanges, between which latter and the flanges of the ring a the leather packing M is placed and held in position. The upper and lower plates, f, form the entire support for the ring 6, the inwardly-projecting flange 7c of which is inserted between the plates and holds them apart, forming a space, into which the water enters before passing into the piston-rod. The piston is held in position by a pin, g, above the upper plate, and a nut, below thelower plate, which combined hold the parts in proper relative position. The portion of the piston-rod J provided with the holes at rests between the plates f and opens communication with the pump-barrel.

N is a valve made of suitable flexible material and provided with a central opening sufliciently large for the free passage of the piston-rod. This valveN is situated between .lower plate f.

the plates,and is adapted to move upward and close the openings h in the upper plate f, and downward and close the openings h in the \Vhen this valve is in its highest position,the openings d in the pistonrod form aeommunication between the pistonrod and that portion of the pump-barrel below the piston, and when in its lowest position opens a communication between the piston-rod and the pump-barrel above the piston.

a partial vacuum is formed above the same,

' to enter the hollow piston-rod.

which causes the water to pass up the passageway E,through the valve F,and onto the piston. When the piston begins to ascend, the valve N is forced 'down onto the lower plate f, thereby enabling the water above the piston This upward movement of the piston causes the valve i to rise and the valve F to close, and allows the water to enter the barrel below the piston. When the piston descends, the valve F opens and the valve 2' closes, and the pressure of water below the piston forces the valve N upward against the upper plate and enables the water below the piston to pass into the hollow piston-rod. 7

From the foregoing it will be seen that while the pump is being operated the water is forced upward in a steady stream,and passes through the upper end of the hollow piston-rod and enters the pipe G, and rises therein up to the pump-stock.

It is evident that slight changes in the construction and relative arrangement of the several parts might be resorted to without departing from the spirit of our invention; and hence we would have it understood that we do not limit ourselves to the exact construction shown and described, but consider ourselves at -1iberty to make such changes as fairly fall within the spirit and scope of our invention.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the pump-barrel having a valved opening below the piston and a valved opening above the piston, of a hollow piston-rod having openings near its lower end, and the piston. consisting of a ring, 6, having upper and lower annular flanges, the upper and lowerperforated plates f, the flexible packing-rings held between the said flanges and plates, and the valve N between the plates, all of the said parts being combined, and adapted to operate as described.

2. The combination, with a pump-cylinder and hollow piston-rod, the latter secured at its upper end to the rod K, of the piston consisting of the ring 6, having annular flanges, the upper and lower perforated plates f, the flexible packing-ring, and the valve located on the piston between the perforated plates, and

adapted to move above and below the opening JACOB F. HESS. FREDRIOK H. SNYDER. LENERD HESS.

JACOB F. SNYDER. OHARES F. SNYDER.

Witnesses:

JOHN HEIERMANN, REINHART WITTMAN. 

